https://homelab.nbkelley.com/tags/prometheus/ Recent content in Prometheus on homelab Hugo en Tue, 21 Apr 2026 00:00:00 +0000 https://homelab.nbkelley.com/docs/monitoring/pipeline/ Tue, 21 Apr 2026 00:00:00 +0000 https://homelab.nbkelley.com/docs/monitoring/pipeline/ <h1 id="ai-driven-monitoring-pipeline">AI-Driven Monitoring Pipeline<a class="anchor" href="#ai-driven-monitoring-pipeline">#</a></h1> <h2 id="what-was-established">What Was Established<a class="anchor" href="#what-was-established">#</a></h2> <p>The monitoring pipeline is fully operational and running hourly. It collects rich structured data from four sources (Prometheus — 7 metrics, Uptime Kuma, UniFi, Synology), runs 4 parallel Ollama summarization calls, synthesises a final status report, and writes everything to Postgres. Hourly snapshots of raw UniFi and Prometheus data are stored in dedicated tables for delta computation. End-to-end runtime is ~13 minutes using <code>gemma4:e4b</code> CPU-only on the Pavilion — accepted as-is pending Mac Studio.</p> https://homelab.nbkelley.com/docs/infrastructure/node-exporter/ Tue, 21 Apr 2026 00:00:00 +0000 https://homelab.nbkelley.com/docs/infrastructure/node-exporter/ <h1 id="node-exporter-deployment">Node Exporter Deployment<a class="anchor" href="#node-exporter-deployment">#</a></h1> <h2 id="what-was-established">What Was Established<a class="anchor" href="#what-was-established">#</a></h2> <p><code>node_exporter</code> is used to expose system-level metrics (CPU, RAM, Disk, Network) from Linux hosts to the central Prometheus instance at 192.168.1.167.</p> <h2 id="monitored-hosts">Monitored Hosts<a class="anchor" href="#monitored-hosts">#</a></h2> <table> <thead> <tr> <th>Host</th> <th>IP</th> <th>Port</th> <th>Prometheus job</th> <th>VLAN</th> </tr> </thead> <tbody> <tr> <td>nk-celebrimbor (Pavilion)</td> <td>192.168.2.192</td> <td>9100</td> <td>pavilion</td> <td>mithrandir</td> </tr> <tr> <td>wiki-llm</td> <td>192.168.1.206</td> <td>9100</td> <td>wiki</td> <td>gandalf</td> </tr> </tbody> </table> <h2 id="installation">Installation<a class="anchor" href="#installation">#</a></h2> <h3 id="method-a-apt-ubuntu--preferred-for-ubuntu-hosts">Method A: apt (Ubuntu) — preferred for Ubuntu hosts<a class="anchor" href="#method-a-apt-ubuntu--preferred-for-ubuntu-hosts">#</a></h3> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo apt install prometheus-node-exporter </span></span><span style="display:flex;"><span><span style="color:#75715e"># Service auto-enabled; runs on port 9100</span></span></span></code></pre></div><h3 id="method-b-manual-binary-other-distros">Method B: Manual binary (other distros)<a class="anchor" href="#method-b-manual-binary-other-distros">#</a></h3> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>wget https://github.com/prometheus/node_exporter/releases/download/v1.11.1/node_exporter-1.11.1.linux-amd64.tar.gz </span></span><span style="display:flex;"><span>tar xvf node_exporter-1.11.1.linux-amd64.tar.gz </span></span><span style="display:flex;"><span>sudo cp node_exporter-1.11.1.linux-amd64/node_exporter /usr/local/bin/</span></span></code></pre></div><p>Create <code>/etc/systemd/system/node_exporter.service</code>:</p>